Time circuits
From Futurepedia, the Back to the Future Wiki
The time circuits of the DeLorean time machine were an integral part to its functionality. They were coupled with an input device and a display. The display was divided into three sections: Destination Time, Present Time, and Last Time Departed.
Years were limited to four digits and there were no possible negative years that could be reached (i.e. years before 0 AD). This means the DeLorean could travel to any time from 12:00 am on January 01, 0000 AD to 11:59 pm on December 31, 9999 AD. It is unclear what would happen if one were to travel to the latter date since, after only one minute, it would be the year 10000 AD and the time display would therefore no longer be able to show the present time.
Doc Brown demonstrated its capabilities to Marty McFly after its first test, giving two well-known but erroneous dates as examples, the signing of the Declaration of Independence, July 4, 1776, and the birth of Christ, December 25, 0000. (In practice, these events could only be viewed by driving to the location of the event with the help of gas stations and freight ships, and then travelling back in time, since the DeLorean did not yet travel in space at this point in its construction.) Then, Doc Brown gave a third example by setting them to the day that he invented time travel, November 5, 1955.
The setup was apparently user-friendly considering that Marty and Biff Tannen were both able to insert destination times quickly and easily. In order to enter a date and time, one pressed digits on the keypad in the order that they would be displayed, and then press the activation button. For example, to set the time to November 5, 1955 at 9 AM, one would press 110519550900 and hit ENTER. In order to add time in the afternoon of a date, the operator would likely have keyed 1300, 1400, etc to represent 1 PM and 2 PM respectively.
After the trip to 2015, the time circuits began malfunctioning, displaying Jan 01, 1885 in the destination slot in mid flight. A bolt of lightning triggered the malfunction to send the DeLorean from 1955 to 1885. Though the vehicle was in mid-air, the spin created by the lightning bolt allowed it to reach 88 mph.
After the time machine was rebuilt by Doc in 1991, the time circuits were constructed to be voice-activated, as well as being coupled with a device that allowed spacial displacement. It appears that the circuits could display years larger than 10,000 years.
Interestingly, on board the Jules Verne Train, Doc still built a display that only contained 4 digits for the year, thus creating the 10,000 year problem again.[1]
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[edit] External links
- Time circuits by a fan Time circuits built with the electronics components which come from the era of BTTF
